Vulnerability Intelligence Report
Microsoft Windows Privilege Escalation Vulnerability
CVE-2018-8440
An elevation of privilege vulnerability exists when Windows improperly handles calls to Advanced Local Procedure Call (ALPC), aka "Windows ALPC Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.
CISA KEV
SSVC: Active Exploitation
CVSS Base Score
7.8
HIGH
Exploitability:1.9
Impact Score:5.9
EPSS Probability:18.53%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
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SSVC Action
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Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | Windows 7 | 32-bit Systems Service Pack 1 (affected), x64-based Systems Service Pack 1 (affected) |
| Microsoft | Windows Server 2012 R2 | (Server Core installation) (affected) |
| Microsoft | Windows RT 8.1 | Windows RT 8.1 (affected) |
| Microsoft | Windows Server 2008 | 32-bit Systems Service Pack 2 (affected), 32-bit Systems Service Pack 2 (Server Core installation) (affected), Itanium-Based Systems Service Pack 2 (affected), x64-based Systems Service Pack 2 (affected), x64-based Systems Service Pack 2 (Server Core installation) (affected) |
| Microsoft | Windows Server 2012 | (Server Core installation) (affected) |
| Microsoft | Windows 8.1 | 32-bit systems (affected), x64-based systems (affected) |
| Microsoft | Windows Server 2016 | (Server Core installation) (affected) |
| Microsoft | Windows Server 2008 R2 | Itanium-Based Systems Service Pack 1 (affected), x64-based Systems Service Pack 1 (affected), x64-based Systems Service Pack 1 (Server Core installation) (affected) |
| Microsoft | Windows 10 | 32-bit Systems (affected), Version 1607 for 32-bit Systems (affected), Version 1607 for x64-based Systems (affected), Version 1703 for 32-bit Systems (affected), Version 1703 for x64-based Systems (affected), Version 1709 for 32-bit Systems (affected), Version 1709 for x64-based Systems (affected), Version 1803 for 32-bit Systems (affected), Version 1803 for x64-based Systems (affected), x64-based Systems (affected) |
| Microsoft | Windows 10 Servers | version 1709 (Server Core Installation) (affected), version 1803 (Server Core Installation) (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2018-03-14T00:00:00 |
| Published | 2018-09-13T00:00:00 |
| Patch Date | 2018-09-12 |
| Last Updated | 2025-10-21T23:45:48 |
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